JPH0553932B2 - - Google Patents
Info
- Publication number
- JPH0553932B2 JPH0553932B2 JP60011513A JP1151385A JPH0553932B2 JP H0553932 B2 JPH0553932 B2 JP H0553932B2 JP 60011513 A JP60011513 A JP 60011513A JP 1151385 A JP1151385 A JP 1151385A JP H0553932 B2 JPH0553932 B2 JP H0553932B2
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- opening degree
- intake
- swirl
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 13
- 238000002485 combustion reaction Methods 0.000 description 8
- 230000004043 responsiveness Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
- F02B31/08—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は吸気スワールを調整するスワール制御
弁を吸気通路に設けたエンジンの吸気装置の改良
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in an intake system for an engine in which a swirl control valve for adjusting intake swirl is provided in an intake passage.
（従来技術）
従来から、吸気スワールを調整するスワール制
御弁を備えたエンジンは種々知られている。例え
ば、低負荷用吸気通路と制御弁（スワール制御
弁）を備えた高負荷用通路を形成し、低負荷時に
は上記制御弁を閉じて上記低負荷用吸気通路から
吸気を供給することにより、吸気流速を高めると
ともに吸気スワールを生じさせて燃焼性を向上
し、高負荷時には制御弁を開いて両吸気通路から
吸気を供給することにより、吸気抵抗を軽減する
とともに吸気スワールを抑制するようにしたエン
ジンが知られている。特に吸気流速、吸気スワー
ル等の吸気供給状態を種々の運転状態において適
正に調整するため、例えば特開昭59−138723号公
報に示されるように、エンジン回転数および負荷
等の運転状態と、制御弁の前後の差圧等の制御弁
の開度に関連した信号とをそれぞれ検出し、上記
差圧等の検出値と記憶装置から読出した運転状態
に適合する目標値とを比較し、上記検出値が目標
値となるように制御弁の開度をフイードバツク制
御するようにした装置も知られている。(Prior Art) Various engines have been known that are equipped with swirl control valves that adjust intake swirl. For example, a high-load passage is formed that includes a low-load intake passage and a control valve (swirl control valve), and when the load is low, the control valve is closed and intake air is supplied from the low-load intake passage. The engine increases flow velocity and creates intake swirl to improve combustion performance, and when the load is high, the control valve opens to supply intake air from both intake passages, reducing intake resistance and suppressing intake swirl. It has been known. In particular, in order to properly adjust intake air supply conditions such as intake flow velocity and intake swirl in various operating conditions, for example, as shown in Japanese Patent Application Laid-Open No. 138723/1982, the operating conditions such as engine rotation speed and load, and control Signals related to the opening degree of the control valve, such as the differential pressure before and after the valve, are detected, and the detected value of the differential pressure, etc., is compared with a target value read out from the storage device and adapted to the operating condition, and the above-mentioned detection is performed. A device is also known in which the opening degree of a control valve is feedback-controlled so that the opening value becomes a target value.
ところで、このように制御弁の開度をフイード
バツク制御する場合に、従来では制御の安定性と
応答性とを両立させることが難しかつた。すなわ
ち、この種の装置に用いられる制御弁の開度とス
ワール比（スワールの強さ）との関係を調べる
と、制御弁の開度が小さいときはその開度変化に
伴うスワール比の変動が大きく、制御弁の開度が
大きくなるほどスワール比の変動は小さくなるた
め、フイードバツク制御の制御利得を大きくする
と、制御弁の開度が小さいときにスワール比が急
激に変動し過ぎてサージングが生じ、これを防止
するため制御利得をある程度小さくすると、制御
弁の開度が大きいときに制御の応答性が悪くな
る。 By the way, when performing feedback control of the opening degree of the control valve in this manner, it has conventionally been difficult to achieve both control stability and responsiveness. In other words, when we examine the relationship between the opening degree of the control valve used in this type of device and the swirl ratio (swirl strength), we find that when the opening degree of the control valve is small, the swirl ratio fluctuates as the opening degree changes. The larger the opening of the control valve becomes, the smaller the variation in the swirl ratio becomes. Therefore, if the control gain of feedback control is increased, the swirl ratio will fluctuate too rapidly when the opening of the control valve is small, causing surging. If the control gain is reduced to a certain extent to prevent this, the responsiveness of the control will deteriorate when the opening degree of the control valve is large.
（発明の目的）
本発明はこのような事情に鑑み、スワール制御
弁の開度を運転状態に適合するようにフイードバ
ツク制御する場合に、制御の安定性と応答性とを
両立させることのできるエンジンの吸気装置を提
供するものである。(Object of the Invention) In view of the above circumstances, the present invention provides an engine that can achieve both control stability and responsiveness when feedback control is performed to match the opening degree of the swirl control valve to the operating conditions. The present invention provides an air intake device.
（発明の構成）
本発明は、吸気スワールを調整するスワール制
御弁を吸気通路に設けたエンジンの吸気装置にお
いて、エンジンの運転状態を検出する運転状態検
出手段と、上記スワール制御弁の開度に関連する
信号を検出する検出手段と、上記信号の運転状態
に適合した目標値を記憶した記憶手段と、上記両
検出手段の出力を受け、上記信号の検出値と運転
状態に応じて上記記憶手段から読出した目標値と
を比較して上記スワール制御弁の開度をフイード
バツク制御するとともに、その制御利得をスワー
ル制御弁の開度が大きくなるほど大きく設定する
制御手段とを設けたものである。(Structure of the Invention) The present invention provides an engine intake system in which a swirl control valve for adjusting intake swirl is provided in an intake passage, and includes an operating state detection means for detecting an operating state of the engine, and an opening degree of the swirl control valve. a detection means for detecting a related signal; a storage means for storing a target value suitable for the driving condition of the signal; The control means is provided with a control means for performing feedback control of the opening degree of the swirl control valve by comparing the opening degree with a target value read from the control valve, and setting the control gain to be larger as the opening degree of the swirl control valve becomes larger.
つまり、上記スワール制御弁の開度が小さいと
きには、その開度変化に伴うスワール比の変動が
大きくなるので、上記制御利得を比較的小さくす
ることによりスワール制御弁の開度変化を緩やか
に行わせて吸気スワールの過激な変動を防止し、
スワール制御弁の開度が大きいときには、その開
度変化に伴うスワール比の変動が小さくなるの
で、制御利得を大きくすることにより制御の応答
性を高めるようにしたものである。 In other words, when the opening degree of the swirl control valve is small, the fluctuation of the swirl ratio due to the change in the opening degree becomes large, so by making the control gain relatively small, the opening degree of the swirl control valve is made to change gradually. prevents drastic fluctuations in intake swirl,
When the opening degree of the swirl control valve is large, fluctuations in the swirl ratio due to changes in the opening degree become small, so the responsiveness of the control is improved by increasing the control gain.
（実施例）
第１図は本発明装置の全体構造の一実施例を示
す。この図において、エンジンのシリンダ１に形
成された燃焼室２に吸気を供給する吸気通路３に
は、スロツトル弁４の下流に高負荷用吸気通路５
および低負荷用吸気通路６が形成されており、吸
気通路３の下流端は上記燃焼室２に開口し、その
開口部７に吸気弁８が装備されている。上記高負
荷用吸気通路５は通路面積が比較的大きく形成さ
れ、上記開口部７に連通しており、この高負荷用
吸気通路５中には蝶形弁等からなるスワール制御
弁（以下、実施例では制御弁という）９が介設さ
れている。また、低負荷用吸気通路６は、高負荷
用吸気通路５と比べて通路面積が小さく、高負荷
用吸気通路５に沿つてその下方に形成されてお
り、上記制御弁９の上流の高負荷用吸気通路５か
ら分岐し、下流端が上記吸気弁８の直上流で高負
荷用吸気通路５に開口している。(Embodiment) FIG. 1 shows an embodiment of the overall structure of the device of the present invention. In this figure, an intake passage 3 that supplies intake air to a combustion chamber 2 formed in a cylinder 1 of the engine includes a high-load intake passage 5 downstream of a throttle valve 4.
A low-load intake passage 6 is formed, and the downstream end of the intake passage 3 opens into the combustion chamber 2, and an intake valve 8 is provided at the opening 7 of the intake passage 3. The high-load intake passage 5 is formed with a relatively large passage area and communicates with the opening 7, and the high-load intake passage 5 includes a swirl control valve (hereinafter referred to as an embodiment) consisting of a butterfly valve or the like. In the example, a control valve (referred to as a control valve) 9 is provided. Furthermore, the low-load intake passage 6 has a smaller passage area than the high-load intake passage 5, and is formed along and below the high-load intake passage 5, and is located upstream of the high-load intake passage 9. It branches from the high-load intake passage 5, and its downstream end opens into the high-load intake passage 5 immediately upstream of the intake valve 8.
上記低負荷用吸気通路６の下流端はシリンダ１
の接線方向に向けて開口し、この低負荷用吸気通
路６を通る吸気を燃焼室２の周方向に供給するよ
うにしている。一方、上記高負荷用吸気通路５の
下流端付近は、吸気通路３に対してシリンダ１の
軸線方向に開口するように屈曲もしくは湾曲した
形状となつている。したがつて、上記制御弁９が
閉じられたときには、この制御弁９によつて高負
荷用吸気通路５が遮断された状態で低負荷用吸気
通路６のみから燃焼室２に吸気が供給されること
により、吸気流速が高められるとともに燃焼室２
内に強い吸気スワールが生じ、制御弁９が開かれ
ると、高負荷用吸気通路５から吸気が供給される
ことにより吸気抵抗が軽減されるとともに吸気ス
ワールが抑制され、制御弁９の開度に応じて吸気
流速、吸気抵抗および吸気スワールの強さが調節
される構造となつている。 The downstream end of the low-load intake passage 6 is connected to the cylinder 1.
The combustion chamber 2 is opened in the tangential direction, and intake air passing through the low-load intake passage 6 is supplied to the combustion chamber 2 in the circumferential direction. On the other hand, the vicinity of the downstream end of the high-load intake passage 5 is bent or curved so as to open in the axial direction of the cylinder 1 with respect to the intake passage 3. Therefore, when the control valve 9 is closed, intake air is supplied to the combustion chamber 2 only from the low-load intake passage 6 while the high-load intake passage 5 is blocked by the control valve 9. As a result, the intake flow rate is increased and the combustion chamber 2
When a strong intake swirl occurs in the air and the control valve 9 is opened, intake air is supplied from the high-load intake passage 5, which reduces intake resistance and suppresses the intake swirl, causing the opening of the control valve 9 to change. The structure is such that the intake flow rate, intake resistance, and intake swirl strength are adjusted accordingly.
上記制御弁９は、低負荷時に閉じ、運転状態に
応じて開度が変化するように、リニアソレノイド
等からなるアクチユエータ１０を介し、マイクロ
コンピユータ等で構成したコントロールユニツト
１１により制御されている。上記コントロールユ
ニツト１１には、スロツトル弁４下流の吸気負圧
を検出することによつて負荷を検出する負圧セン
サ１２と、エンジン回転数を検出する回転数セン
サ１３と、前記アクチユエータ１０の作動量を検
出することによつて制御弁９の開度を検出するポ
テシヨメータ１４とから各検出信号が入力されて
いる。上記負圧センサ１２および回転数センサ１
３は運転状態検出手段を構成し、ポテシヨメータ
１４は制御弁９の開度に関連する信号を検出する
検出手段となる。 The control valve 9 is controlled by a control unit 11 made up of a microcomputer or the like via an actuator 10 made of a linear solenoid or the like so that it closes when the load is low and its opening changes depending on the operating state. The control unit 11 includes a negative pressure sensor 12 that detects the load by detecting the intake negative pressure downstream of the throttle valve 4, a rotation speed sensor 13 that detects the engine speed, and an operating amount of the actuator 10. Each detection signal is input from a potentiometer 14 which detects the opening degree of the control valve 9 by detecting the opening degree of the control valve 9. The above negative pressure sensor 12 and rotation speed sensor 1
3 constitutes an operating state detection means, and the potentiometer 14 serves as a detection means for detecting a signal related to the opening degree of the control valve 9.
上記コントロールユニツト１１は、メモリ（記
憶手段）１５と、CPU等からなる制御部（制御
手段）１６とを有し、上記メモリ１５に、第２図
に示すように、制御弁９の目標開度φ0が吸気負
圧Pbおよびエンジン回転数Ｎに対応づけたマツ
プとして予め記憶されている。上記目標開度φ0
は基本的には低負荷時に最小開度とされ、高負荷
高回転時に開度が大きくなるようにし、種々の運
転状態に適合するように設定されている。また、
上記制御部１６は、上記負圧センサ１２および回
転数センサ１３によつて検出される運転状態に応
じた目標開度φ0をメモリから読出し、この目標
開度φ0とポテシヨメータ１４の出力とを比較し
て制御弁９の開度をフイードバツク制御するとと
もに、その制御利得Ｇを、第３図に示すように、
目標開度φ0が小さいときには比較的小さくし、
目標開度φ0が大きくなるほど大きくするように
している。この目標開度φ0に応じた制御利得も
予めメモリ１５に記憶され、制御部１６によつて
読出されるようにしている。 The control unit 11 has a memory (storage means) 15 and a control section (control means) 16 consisting of a CPU or the like, and the memory 15 stores the target opening degree of the control valve 9 as shown in FIG. φ 0 is stored in advance as a map in correspondence with intake negative pressure Pb and engine speed N. Above target opening φ 0
Basically, the opening degree is set to be the minimum at low load, and the opening degree is set to be large at high load and high rotation, so as to be suitable for various operating conditions. Also,
The control unit 16 reads from the memory a target opening degree φ 0 corresponding to the operating state detected by the negative pressure sensor 12 and the rotation speed sensor 13 , and compares this target opening degree φ 0 with the output of the potentiometer 14 . In comparison, the opening degree of the control valve 9 is feedback-controlled, and the control gain G is calculated as shown in FIG.
When the target opening degree φ 0 is small, make it relatively small,
It is made larger as the target opening degree φ 0 becomes larger. A control gain corresponding to this target opening degree φ 0 is also stored in advance in the memory 15 and read out by the control section 16.
第４図は上記制御部１６による制御の具体例を
示すフローチヤートである。このフローチヤート
はエンジンが作動されたときにスタートし、先ず
ステツプS1で吸気負圧Pb、エンジン回転数Ｎお
よび制御弁９の開度φを読込む。次にステツプS2
で、現実の吸気負圧Pbおよびエンジン回転数Ｎ
に応じて第２図のマツプから読出した値ｆ（Ｎ，
Pb）を目標開度φ0と設定する。続いてステツプ
S3では、第３図に示すような対応関係をもつて、
ステツプS2で設定された目標開度φ0に対応する
値f′（φ0）を制御利得Ｇと設定する。 FIG. 4 is a flowchart showing a specific example of control by the control section 16. This flowchart starts when the engine is started, and first, in step S1 , the intake negative pressure Pb, the engine speed N, and the opening degree φ of the control valve 9 are read. Next step S 2
Then, the actual intake negative pressure Pb and engine speed N
The value f(N,
Pb) is set as the target opening φ 0 . Then step
In S 3 , with the correspondence shown in Figure 3,
The value f' (φ 0 ) corresponding to the target opening degree φ 0 set in step S 2 is set as the control gain G.
次にステツプS4〜ステツプS6で、制御弁９の現
実の開度（ポテシヨメータ１４の出力）φと目標
開度φ0とを比較し、いずれが大きいかに応じ、
制御弁９を開方向に作動させるか閉方向に作動さ
せるかを決める符号値ｉを１または−１とし、つ
まり目標開度に付近ける方向に制御弁９を作動さ
せるように符号値ｉを決める。続いてステツプS7
で［φ＝φ＋iG］と演算し、つまり制御弁９の
開度φを上記制御利得Ｇ分だけ閉方向または開方
向に変化される演算を行い、ステツプS8でこの演
算結果に応じて制御弁９を駆動させる。そして、
以上のステツプS1〜S8の処理を繰返すことによつ
て制御弁９の開度がほぼ目標開度となるようにフ
イードバツク制御を行う。 Next, in steps S4 to S6 , the actual opening degree of the control valve 9 (output of the potentiometer 14) φ and the target opening degree φ0 are compared, and depending on which one is larger,
The sign value i that determines whether the control valve 9 is operated in the opening direction or the closing direction is set to 1 or -1, that is, the sign value i is determined so that the control valve 9 is operated in a direction that approaches the target opening. . Next step S 7
[φ=φ+iG], that is, the opening degree φ of the control valve 9 is changed by the control gain G in the closing direction or the opening direction, and in step S8 , the control valve is changed according to the calculation result. Drive 9. and,
By repeating the above steps S1 to S8 , feedback control is performed so that the opening degree of the control valve 9 becomes approximately the target opening degree.
以上のフローチヤートに従つた制御により、運
転状態に応じて制御弁９の開度が適正に制御さ
れ、吸気流速、吸気スワール、吸気抵抗等の吸気
供給状態が運転状態に適合するように制御される
こととなる。特に本発明では、第３図に示すよう
な対応関係で制御弁９の開度（目標開度φ0）に
応じて制御利得Ｇが変えられるため、フイードバ
ツク制御に伴う吸気スワール等の吸気供給状態の
変動も適度に調整される。すなわち、一般にこの
種の吸気装置においては制御弁９の開度変化に伴
つてスワール比が第５図に示すように二次曲線的
に変化し、つまりスワール比自体が制御弁９の開
度が大きくなるにつれて小さくなるとともに、ス
ワール比の変化率（勾配）も制御弁９の開度が小
さいときには大きく、制御弁９の開度が大きくな
るほど小さくなる。このため、一定の制御利得を
もつて制御弁９の開度をフイードバツク制御する
一般的な制御手段によると、制御弁９の開度が比
較的小さい範囲では吸気スワール等が急激に変動
し過ぎ、制御弁９の開度が大きい範囲では吸気ス
ワール等の変動が緩慢になるという傾向がある。
これに対して、前述のように制御弁９の開度に制
御利得Ｇを変えつつフイードバツク制御を行えば
上記の傾向が是正されることとなる。 By controlling according to the above flowchart, the opening degree of the control valve 9 is appropriately controlled according to the operating conditions, and the intake air supply conditions such as intake flow rate, intake swirl, and intake resistance are controlled to match the operating conditions. The Rukoto. In particular, in the present invention, since the control gain G is changed according to the opening degree (target opening degree φ 0 ) of the control valve 9 in a correspondence relationship as shown in FIG. fluctuations are also adjusted appropriately. That is, in general, in this type of intake system, the swirl ratio changes in a quadratic curve as shown in FIG. 5 as the opening of the control valve 9 changes. As the opening degree of the control valve 9 increases, the rate of change (gradient) of the swirl ratio also increases when the opening degree of the control valve 9 is small, and decreases as the opening degree of the control valve 9 increases. For this reason, according to a general control means that feedback-controls the opening degree of the control valve 9 with a constant control gain, the intake swirl etc. fluctuate too rapidly in a range where the opening degree of the control valve 9 is relatively small. In a range where the opening degree of the control valve 9 is large, fluctuations in intake swirl and the like tend to be slow.
On the other hand, if feedback control is performed while changing the control gain G to the opening degree of the control valve 9 as described above, the above-mentioned tendency will be corrected.
なお、制御弁９の開度に関連する信号を検出す
る検出手段としては、上記実施例に示すポテシヨ
メータ１４の代りに、制御弁９の弁軸の回動量を
検出するもの、あるいは制御弁９の前後の差圧を
検出するもの等を用いてもよい。また運転状態検
出手段も上記実施例に限定されず、例えば負圧セ
ンサ１２の代りに、スロツトル弁４の開度を検出
するスロツトル開度センサを用いてもよい。 Note that as a detection means for detecting a signal related to the opening degree of the control valve 9, instead of the potentiometer 14 shown in the above embodiment, a detection means for detecting the amount of rotation of the valve shaft of the control valve 9, or a detection means for detecting the amount of rotation of the valve shaft of the control valve 9, or It is also possible to use a device that detects the differential pressure between the front and rear. Further, the operating state detection means is not limited to the above embodiment, and for example, a throttle opening sensor that detects the opening of the throttle valve 4 may be used instead of the negative pressure sensor 12.
また、本発明は、上記実施例のように低負荷用
吸気通路６の下流端が吸気弁８の直上流の高負荷
用吸気通路５に開口した形式のエンジンに限ら
ず、低負荷用および高負荷用の両吸気通路が独立
してそれぞれ燃焼室に開口し、その各開口部に吸
気弁が装備された形式のエンジンにも適用し得る
ものである。 Further, the present invention is not limited to an engine in which the downstream end of the low-load intake passage 6 opens into the high-load intake passage 5 immediately upstream of the intake valve 8 as in the above embodiment; The present invention can also be applied to an engine in which both load intake passages independently open into a combustion chamber, and each opening is equipped with an intake valve.
（発明の効果）
以上のように本発明は、スワール制御弁の開度
を運転状態に応じてフイードバツク制御する場合
に、その制御利得をスワール制御弁の開度が大き
くなるほど大きくしているため、スワール制御弁
の開度が小さい範囲で制御が行なわれるときに吸
気スワール等が急激に変動し過ぎることを防止す
る一方、スワール制御弁の開度が大きい範囲で制
御が行なわれるときに吸気スワール等の変動が緩
慢になることを防止し、制御の安定性と応答性と
を共に満足することができるものである。(Effects of the Invention) As described above, in the present invention, when the opening degree of the swirl control valve is feedback-controlled according to the operating state, the control gain is increased as the opening degree of the swirl control valve becomes larger. This prevents intake swirl, etc. from fluctuating too rapidly when control is performed in a small opening range of the swirl control valve, and prevents intake swirl, etc. from fluctuating too rapidly when control is performed in a large opening range of the swirl control valve. It is possible to prevent the fluctuations from becoming slow and to satisfy both control stability and responsiveness.
第１図は本発明装置の一実施例を示す概略図、
第２図および第３図はメモリに記憶された目標開
度および制御利得の説明図、第４図は制御のフロ
ーチヤート、第５図は制御弁の開度とスワール比
との関係説明図である。
３……吸気通路、４……スロツトル弁、５……
高負荷用吸気通路、６……低負荷用吸気通路、９
……制御弁、１１……コントロールユニツト、１
２……負圧センサ、１３……回転数センサ、１４
……ポテシヨメータ、１５……メモリ、１６……
制御部。
FIG. 1 is a schematic diagram showing an embodiment of the device of the present invention;
Figures 2 and 3 are explanatory diagrams of the target opening degree and control gain stored in the memory, Figure 4 is a flowchart of control, and Figure 5 is an explanatory diagram of the relationship between the opening degree of the control valve and the swirl ratio. be. 3...Intake passage, 4...Throttle valve, 5...
High load intake passage, 6...Low load intake passage, 9
... Control valve, 11 ... Control unit, 1
2... Negative pressure sensor, 13... Rotation speed sensor, 14
... Potentiometer, 15 ... Memory, 16 ...
control section.
Claims (1)
気通路に設けたエンジンの吸気装置において、エ
ンジンの運転状態を検出する運転状態検出手段
と、上記スワール制御弁の開度に関連する信号を
検出する検出手段と、上記信号の運転状態に適合
した目標値を記憶した記憶手段と、上記両検出手
段の出力を受け、上記信号の検出値と運転状態に
応じて上記記憶手段から読出した目標値とを比較
して上記スワール制御弁の開度をフイードバツク
制御するとともに、その制御利得をスワール制御
弁の開度が大きくなるほど大きく設定する制御手
段とを設けたことを特徴とするエンジンの吸気装
置。1. In an engine intake system in which a swirl control valve for adjusting intake swirl is provided in the intake passage, an operating state detection means for detecting the operating state of the engine, and a detection means for detecting a signal related to the opening degree of the swirl control valve. and a storage means that stores a target value suitable for the driving condition of the signal, and receiving the outputs of both the detection means, compares the detected value of the signal with the target value read from the storage means according to the driving condition. An intake system for an engine, characterized in that it is provided with a control means for feedback controlling the opening degree of the swirl control valve and setting the control gain to be larger as the opening degree of the swirl control valve becomes larger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60011513A JPS61169614A (en) | 1985-01-23 | 1985-01-23 | Engine intake device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60011513A JPS61169614A (en) | 1985-01-23 | 1985-01-23 | Engine intake device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61169614A JPS61169614A (en) | 1986-07-31 |
| JPH0553932B2 true JPH0553932B2 (en) | 1993-08-11 |
Family
ID=11780088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60011513A Granted JPS61169614A (en) | 1985-01-23 | 1985-01-23 | Engine intake device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61169614A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020053721A (en) * | 2000-12-27 | 2002-07-05 | 이계안 | Device for generating variable tumble flow |
-
1985
- 1985-01-23 JP JP60011513A patent/JPS61169614A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61169614A (en) | 1986-07-31 |
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